CN110186202A - A kind of stirring continuous biomass hydrothermal pretreatment device certainly of Driven by Solar Energy - Google Patents

Abstract

The invention is a self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy. The device includes an auxiliary heater, a storage tank, a stirring device, a solid-liquid mixture material pump, a solar concentrator, a heat collector assembly, a temperature sensor and a material collection tank; the auxiliary heater and the stirring device are arranged in the storage tank; One end of the liquid mixture pump is connected to one end of the water pipe, and the other end of the water pipe is in the storage tank; the other end of the solid-liquid mixture pump is connected to one end of the water heat pipe; the other end of the water heat pipe is connected to one end of the water pipe; The other end of the water pipe is in the material collection tank; the invention is a self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy, which is detachable, easy to clean, can realize continuous production and can effectively prevent the solid part of the material from settling. It solves the problems existing in the prior art of high energy consumption, incapability of large-scale continuous production, difficult disassembly, inconvenient cleaning, and inability to uniformly process materials due to sedimentation.

Description

A self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy

technical field

The invention belongs to the technical field of hydrothermal pretreatment, in particular to a self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy.

Background technique

The hydrothermal pretreatment of biomass is a method of pretreating biomass with subcritical water heated above the boiling point and below the critical point. Due to its special properties, the water at this time can effectively accelerate the dissolution and degradation of biomass. However, the current hydrothermal method generally has the following problems: a large amount of fossil energy needs to be consumed in the process of pretreatment of biomass; and the commonly used hydrothermal reactor can only achieve small-scale batch production, so it is urgent to find a A method that can use the hydrothermal method to continuously pretreat biomass in large quantities and effectively reduce energy consumption. As a new energy source, solar energy has become the preferred heating energy source because of its cleanness and renewable energy.

Solar collectors are the key components of various solar heat utilization systems. At present, among all kinds of heat collectors, vacuum tube heat collectors are widely used due to their good heat collection performance, but there are also the following problems when using vacuum tube heat collectors to heat materials at high temperatures: The solid part is easy to adhere to the inner surface of the solar tube and affect the heat collection effect; the tube body is easy to be damaged during the cleaning process, and the material is lost; in addition, the material itself is precipitated in the tube due to gravity, which will affect the heating effect.

Therefore, it is very necessary to design a solar-driven biomass hydrothermal pretreatment device that can realize continuous work, low energy consumption, detachable, and easy to clean.

Contents of the invention

The invention provides a self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy, which is detachable, easy to clean, can realize continuous production and can effectively prevent the solid part of the material from settling, which solves the energy consumption of the prior art It is large, unable to scale continuous production, difficult to disassemble, inconvenient to clean, and unable to process materials uniformly due to sedimentation.

The technical scheme of the present invention is described as follows in conjunction with accompanying drawing:

A self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy, the device includes an auxiliary heater 1, a storage tank 2, a stirring device 3, a solid-liquid mixture pump 4, a solar concentrator 6, and a heat collector assembly 7. Temperature sensor 8 and material collection tank 9; the auxiliary heater 1 is arranged at the bottom of the storage tank 2; the stirring device 3 is arranged in the storage tank 2; one end of the solid-liquid mixture pump 4 It is connected with one end of the first water pipe, and the other end of the first water pipe is arranged in the storage tank 2; the other end of the solid-liquid mixture material extraction pump 4 is connected with the water heat pipe 12 in the heat collector assembly 7 through the pipeline. One end is connected; the other end of the water heat pipe 12 is connected to one end of the second water pipe; the other end of the second water pipe is arranged in the material collection tank 9; a temperature sensor 8 is installed on the second water pipe; the solar energy The condenser lens 6 is installed on the heat collector assembly 7 .

The stirring device 3 includes a stirrer and a stirring rod; the stirrer is threadedly connected with the stirring rod;

The solar concentrator 6 is a glass reflective parabolic mirror whose surface is coated with silver.

The heat collector assembly 7 also includes a solar straight-through pipe, a hoop structure 17 and an internal stirring assembly; the water heat pipe 12 is connected to the solar direct pipe through the hoop structure 17; the internal stirring assembly is arranged in the water heat pipe 12; The outer side of the solar straight-through tube is a hard light-transmitting anti-reflection glass outer tube 10 of customized length and size, and the inner side is an inner layer heat pipe 11 with a solar selective coating; the two ends of the solar straight-through tube are open Intermediate vacuum; the hoop structure 17 is ring-shaped, including a solar straight-through pipe clamping groove 20, and the inner ring of the solar energy straight-through pipe clamping groove 20 is a hollow water heat pipe socket 21; the solar straight-through pipe is stuck in the solar straight-through pipe clamping groove 20 In the middle; the water heat pipe 12 is arranged in the water heat pipe socket 21; the internal stirring assembly includes a bearing 13, a stirring paddle 14, a bearing fixing frame 15 and a stirring shaft 16; the stirring shaft 16 is welded on the bearing 13, the The bearing 13 is stuck on the bearing fixing frame 15 in the water heat pipe 12; the stirring paddle 14 is fixed on the stirring shaft 16; one end of the water heat pipe 12 is a fluid feed end 18, and the other end is a fluid discharge end 19.

There are 7 groups of stirring paddles 14, and each group adopts a three-leaf blade structure.

The beneficial effects of the present invention are:

1) The self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy of the present invention has a novel design, adopts a solar straight-through tube, and a concentrating solar heat collector formed with a concentrating mirror can effectively improve the heating effect, and can Realize continuous hydrothermal pretreatment of biomass.

2) The self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy of the present invention can, when the material does not reach the specified temperature (above 100°C) in the case of insufficient sunlight, the temperature at the discharge port The temperature sensor will automatically alarm. At this time, the heating tube installed at the bottom of the mixing tank can assist in heating the material to make the material reach the specified temperature and realize continuous and stable production.

3) The hydrothermal pipe adopted by the self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy of the present invention is convenient to disassemble, install and clean, can prevent the deposition of attached materials on the inner wall of the solar direct passage pipe, and reduce the impact of direct brushing on the solar energy. In case of damage caused by the straight-through pipe, the stirring component installed inside the water heat pipe can achieve uniform stirring of the fluid, prevent the material from adhering to the inner wall of the water heat pipe, and improve the quality and uniformity of the output.

4) The stirring assembly adopted by the self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy in the present invention can realize the rotation of the spiral blade driven by the material, and the extrusion and grinding force on the solid-liquid mixture material is small in the process of conveying the fluid , to ensure fluid quality.

5) The hoop structure adopted by the solar-driven self-stirring continuous biomass hydrothermal pretreatment device of the present invention is convenient for tightening the solar tube and the hydrothermal tube, improving its stability and facilitating disassembly.

6) The solar straight-through tube used in the solar-driven self-stirring continuous biomass hydrothermal pretreatment device of the present invention can more effectively absorb direct sunlight and scattering, and has good pressure and high temperature resistance.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the side view structural representation of heat collector assembly in the present invention;

Fig. 3 is the front sectional view of heat collector assembly among the present invention;

Fig. 4 is a sectional view of the structure of the hoop in the present invention;

Fig. 5 is a side view of the hoop structure in the present invention.

In the figure: 1. Auxiliary heater; 2. Storage tank; 3. Stirring device; 4. Solid-liquid mixture pump; 5. Sunlight; 6. Solar concentrator; 7. Collector assembly; 8. Temperature sensor 9. Material collection tank; 10. Hard light-transmitting anti-reflection glass outer tube; 11. Inner heat pipe; 12. Water heat pipe; 13. Bearing; 14. Stirring paddle; 15. Bearing fixing frame; 17. Hoop ring structure; 18. Fluid feed end; 19. Fluid discharge end;

Detailed ways

Referring to Fig. 1, a self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy, the device includes an auxiliary heater 1, a storage tank 2, a stirring device 3, a solid-liquid mixture pump 4, a solar concentrating mirror 6, A heat collector assembly 7, a temperature sensor 8 and a material collection tank 9; the auxiliary heater 1 is arranged at the bottom of the storage tank 2; the stirring device 3 is arranged in the storage tank 2; the solid-liquid mixture is extracted One end of the pump 4 is connected to one end of the first water pipe, and the other end of the first water pipe is arranged in the storage tank 2; One end of the water heat pipe 12 is connected; the other end of the water heat pipe 12 is connected to one end of the second water pipe; the other end of the second water pipe is arranged in the material collection tank 9; a temperature sensor 8 is installed on the second water pipe ; The solar concentrator 6 is installed on the collector assembly 7 . The solar concentrating mirror 6 and the heat collector assembly 7 together form a solar heat collection system.

The auxiliary electric heater 1 can choose the 6-point external thread 1500W with temperature control "U" type auxiliary electric heater of the "Reton" brand, the model is JMC-EH, the working voltage is 220V, the heating body is made of stainless steel, and the handle is made of ABS plastic, the size is 50cm, the power cord is 1.5 square meters, and it is installed on the left side of the storage tank, 80mm from the bottom, at the 6-point inner tooth mouth. When the temperature of the material in the water heat pipe does not reach the specified temperature (greater than 100 degrees) due to insufficient sunlight, the auxiliary heater starts to operate, and heats the material in the material storage tank 2 to 100 degrees Celsius, and then keeps it warm.

The storage tank 2 is a non-standard part, made of stainless steel, a cube with a cover on the upper part with a size of 600mm*600mm*600mm, the thickness of the stainless steel is 5mm, and there is a 6 point on the left side of the storage tank 100mm from the bottom. The inner tooth mouth is used for installing the auxiliary electric heater 1. There is an 8-point inner tooth opening in the middle of the lid, which is used to install the stirring device 3 . There is an 8-point inner tooth opening 150mm from the left side of the middle of the cover, which is used to install the suction pipe.

The stirring device 3 includes a stirrer and a stirring rod.

The agitator is an electric agitator of the "Lianguan" brand, the model is ZY-MH-210, the rated voltage is 220V, it can be divided into 6 gears for speed regulation, the full-load speed is 1100 rpm, and the full-load load power is 2400W. Stir the solid-liquid mixture material in the storage tank 2.

The stirring rod is a non-standard part, made of stainless steel. The rod body adopts a rod body with a threaded joint that is consistent with the connection port of the mixer. The total length of the rod body is 450mm. Two sets of two-bladed stirring paddles are used. The interval is 150mm, the major axis of the blade is 250mm, and the minor axis is 80mm. Two sets of stirring paddles with two blades in random arrangement are beneficial to fully mix the materials evenly and reduce the rotation resistance.

The pump body 4 for extracting materials can be an electric sewage pump of the "Guangquan" brand, the model is WQ15-20-2.2, the power is 2.2kW, the flow rate is 15m3/h, and the voltage is 380V, which is used to pump materials to the water. Heating is carried out in the heat pipe 12.

The solar concentrating mirror 6 has a length of 2m and a width of 1m. The surface of the solar concentrating mirror adopts a glass reflective parabolic mirror coated with silver. Absorb and heat.

Referring to Fig. 2-Fig. 5, the heat collector assembly 7 includes a solar straight-through pipe, a water heat pipe 12, a hoop structure 17 and an internal stirring assembly; the water heat pipe 12 is connected with a solar straight-through pipe through a hoop structure 17; The internal stirring assembly is arranged in the water heat pipe 12 .

The solar straight-through tube includes a hard light-transmitting anti-reflection glass outer tube 10 of customized length and size, and an inner heat-conducting tube 11 with a solar selective coating; both ends of the solar straight-through tube are open with a vacuum in the middle, and the absorption ratio can reach More than 93%, the reflectance is more than 96%, the pressure can be 6-12 MPa, and the design life is generally about 25 years. The operating temperature of the solar straight-through tube can reach up to 300-500°C, and it can withstand the pressure of tap water or circulating pumps. The length of the heat collector assembly 7 is 1.8m, the outer diameter of the outer tube is 90mm, the thickness is 2mm, and the outer diameter of the inner tank is 60mm. The heat collector assembly 7 is connected with the water heat pipe 12 through a hoop structure 17 .

The water heat pipe 12 is a single-layer heat pipe, which is made of high-temperature, high-pressure, and corrosion-resistant materials. The water heat pipe has a length of 2 m, an outer diameter of 46 mm, and a thickness of 5 mm. Connected, the heat collected in the solar direct tube is transferred to the water heat pipe, and the material flowing through the water heat pipe is heated. When the whole device stops running, the water outlet heat pipe can be disassembled, wiped clean, and the materials remaining on the water heat pipe can be collected to prevent the heating effect of the heat collection device from being affected when it is used again.

The hoop structure 17 connecting the body of the solar straight-through pipe and the water-heat pipe includes a solar straight-through pipe clamping groove 20 , and the inner ring is a hollow water-heat pipe socket 21 . The entire structure uses fluororubber as the material with high chemical stability. It has good aging resistance and high temperature resistance, and can be used for a long time at 250°C. The diameter of the ring hoop is 100mm, the diameter of the inner ring is 46mm, the width is 20mm, and the thickness is 8mm. The solar heat collecting tube is stuck in the solar straight-through tube clamping groove 20, while the inner tube passes through the inner center circle of the hoop structure 17, and the hoop structure 17 adopted is convenient for tightening the solar straight-through tube and the water heat pipe 12. The hoop structure 17 is simple in structure, good in stability and easy to disassemble.

The stirring shaft 16 is 2m long and 8.8mm in diameter, and is made of high temperature alloy material, which is light in weight, high temperature resistant and corrosion resistant.

The bearing 13 at the end of the stirring shaft can be a 9*24*7 bearing of the F609ZZ type of "NSK" brand, which is made of bearing steel and has a rubber sealing cover. The stirring shaft 16 is welded on the bearing 13, and the bearing 13 is stuck on the water heat pipe On the bearing holder 15 in 12, realize that stirring shaft 16 drives the rotation of bearing 13.

The bearing fixing frame 15 is a non-standard part, adopts a "ten" shape structure, has good stability, is made of a high-temperature alloy material, has light weight, high temperature resistance and corrosion resistance. The bearing fixing frame 15 is fixed at the inner nozzle of the water heat pipe 12 to support the bearing 13 so that the bearing 13 can run normally.

The stirring paddle 14 is a non-standard part and adopts a three-bladed blade structure. A total of 7 sets of stirring paddles are distributed as shown in the figure. The major axis diameter of each stirring blade is 15 mm, and the short axis diameter is 5 mm. The stirring paddles are also made of superalloy materials. . Under the action of the solid-liquid mixture material extraction pump 4, the material with impact force drives the stirring paddle to rotate, and the rotation of the stirring paddle realizes the stirring effect on the material, so that the material reacts more uniformly and fully during the hydrothermal treatment process.

One end of the water heat pipe 12 is a fluid feed end 18, and the other end is a fluid discharge end 19; the material enters the water heat pipe 12 from the fluid feed end 18 under the action of the solid-liquid mixture material extraction pump 4 for hydrothermal treatment. The finished material is discharged from the fluid feed port 18.

The temperature sensor 8 can be a customizable sensor of the "Songdao" brand, model WZP-187-3PBO. The sensor can withstand a maximum temperature of 450°C. The probe is made of stainless steel, and there is a thin film resistor imported from Germany Heraeus inside. Chip, waterproof probe length 50mm, used with pt50 temperature instrument, there are 3 points of external thread and fluorine rubber sealing ring at the bottom of the probe and the sensor, which can be connected to the pipeline of the hydrothermal treatment device to detect the temperature in real time . When the temperature drops below 100°C, the sensor will give an alarm. At this time, the auxiliary electric heater 1 in the material storage tank 2 starts to operate to auxiliary heat the material, thereby realizing continuous and stable production.

The material collection tank 9 is a cube-shaped hollow box with a box size of 600mm*600mm*600mm, and the box material is made of stainless steel. The upper cover of the collection tank is provided with a feed hole with a 6-point inner mouth, which is used to fix the pipeline of the hydrothermal pretreatment device. The material collection tank is used to collect the material flowing out after treatment.

Working principle of the present invention is:

During the entire process of hydrothermal treatment of biomass, the electric heating storage tank 2 with a stirring paddle ejects the uniformly mixed material solution through the solid-liquid mixture material extraction pump 4. End 17 enters the water heat pipe 12; in the water heat pipe 12, the high-pressure fluid ejected from the solid-liquid mixture material extraction pump 4 flows to drive the stirring blade to rotate, and the material is evenly stirred during the stirring blade rotation process, and the solar concentrator 6 will be in the stirring process. The solar energy generated by collecting sunlight 5 irradiation and the solar energy directly irradiated on the solar straight-through pipe are all gathered into the solar straight-through pipe, and a large amount of heat generated is conducted into the water heat pipe 12, and the materials in the water heat pipe 12 are evenly heated, and the processed materials , output from the other end of the water heat pipe 12 to the material collection tank 9, thereby realizing the uniform heating treatment of the material by the device. In the weather with insufficient sunlight, if the material does not reach the specified temperature (above 100°C), the temperature sensor 8 located at the fluid discharge end 18 will automatically alarm. At this time, the storage tank provided at the bottom of the storage tank 2 1 Auxiliary heating can be carried out on the material to make the material reach the specified temperature, so as to realize continuous and stable production. When the whole device stops running, remove the hoop structure 17 at one end, disassemble the water heat pipe 12, wipe it clean, and collect the materials remaining on the water heat pipe 12, so as to prevent the heating effect of the heat collecting device from being affected when it is used again.

In summary, the present invention has a novel structural design, and the solar hydrothermal treatment device adopted can effectively collect solar energy and carry out continuous hydrothermal treatment of materials. The use causes the material attached to the inner wall of the solar tube to affect the heating effect, and can also prevent direct brushing from causing damage to the solar tube. The stirring assembly installed inside the water heating tube 12 can achieve uniform stirring of the fluid, make the hydrothermal reaction even, and prevent the material from It adheres to the inner wall of the water heat pipe, which improves the uniformity and quality of the fluid discharge.

Claims (5)

1. A self-stirring continuous biomass hydrothermal pretreatment device driven by solar energy is characterized in that the device comprises auxiliary heater (1), storage tank (2), stirring device (3), solid-liquid mixture material Extraction pump (4), solar concentrator (6), heat collector assembly (7), temperature sensor (8) and material collection tank (9); the auxiliary heater (1) is arranged at the bottom of the material storage tank (2) The stirring device (3) is arranged in the storage tank (2); one end of the solid-liquid mixture pump (4) is connected to one end of the first water pipe, and the other end of the first water pipe is arranged on the In the storage tank (2); the other end of the solid-liquid mixture pump (4) is connected to one end of the water heat pipe (12) in the heat collector assembly (7) through a pipeline; the water heat pipe (12) The other end of the second water pipe is connected with one end of the second water pipe; the other end of the second water pipe is arranged in the material collection tank (9); a temperature sensor (8) is installed on the second water pipe; the solar concentrator (6) Install on the collector assembly (7). 2. a kind of solar-driven self-stirring continuous biomass hydrothermal pretreatment device according to claim 1, is characterized in that, described stirring device (3) comprises stirrer and stirring bar; Described stirrer and stirring bar Threaded connection; the stirring rod adopts two sets of two-blade stirring paddles which are arranged up and down in random order. 3. A kind of solar-driven self-stirring continuous biomass hydrothermal pretreatment device according to claim 1, characterized in that, the solar concentrating mirror (6) is a glass reflective parabolic mirror coated with silver on the surface. 4. A kind of solar-driven self-stirring continuous biomass hydrothermal pretreatment device according to claim 1, characterized in that, the collector assembly (7) also includes a solar straight-through pipe and a hoop structure (17) and internal stirring assembly; the water heat pipe (12) is connected with the solar energy straight-through pipe through a hoop structure (17); the internal stirring assembly is arranged in the water heat pipe (12); the outside of the solar energy straight pipe is a custom-made length and Large and small hard light-transmitting anti-reflection glass outer tubes (10), the inner side is an inner layer heat pipe (11) with a sunlight selective coating; the two ends of the solar straight-through tube are open in the middle of the vacuum; the hoop The structure (17) is ring-shaped and includes a solar straight-through pipe clamping slot (20). The inner ring of the solar energy straight-through tube clamping slot (20) is a hollow water heat pipe socket (21); the solar straight-through tube is stuck in the solar straight-through tube clamping slot (20); the water heat pipe (12) is arranged in the water heat pipe socket (21); the internal stirring assembly includes a bearing (13), a stirring paddle (14), a bearing holder (15) and a stirring shaft (16 ); the stirring shaft (16) is welded on the bearing (13), and the bearing (13) is stuck on the bearing holder (15) in the water heat pipe (12); the stirring paddle (14) is fixed on the stirring On the shaft (16); one end of the water heat pipe (12) is a fluid feed end (18), and the other end is a fluid discharge end (19). 5. A solar-driven self-stirring continuous biomass hydrothermal pretreatment device according to claim 4, characterized in that there are 7 groups of stirring paddles (14), and each group adopts a three-bladed blade structure.